Soak the beans overnight in bowl of water. Drain and rinse.
In a large stockpot or saucepan, add the beans with the 8 cups of broth and cook over medium low heat, at slow rolling boil for about an hour.
After the beans have been cooking for about an hour, brown the ground beef and brown the stew beef with the chopped onion in a large skillet. Then slide it into the large pot with the cooking beans. Also add thediced tomatoes, tomato sauce, tomato paste, chili powder, ground cumin and salt and pepper to the beans and meat. Simmer for another 30 minutes, or until beans are tender and beef is cooked through.
Top with preferred toppings.
Serve Chunky Beef & 15 Bean Chili with toppings for dinner or for the big football game each week!